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ASF GitHub Bot commented on GEODE-8278:
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boglesby opened a new pull request #5859:
URL: https://github.com/apache/geode/pull/5859
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> Gateway sender queues using heap memory way above configured value after
> server restart
> ---------------------------------------------------------------------------------------
>
> Key: GEODE-8278
> URL: https://issues.apache.org/jira/browse/GEODE-8278
> Project: Geode
> Issue Type: Bug
> Components: eviction
> Reporter: Alberto Gomez
> Assignee: Alberto Gomez
> Priority: Major
>
> In a Geode system with the following characteristics:
> * WAN replication
> * partition redundant regions
> * overflow configured for the gateway senders queues by means of persistence
> and maximum queue memory set.
> * gateway receivers stopped in one site (B)
> * Operations sent to the site that does not have the gateway receivers
> stopped (A)
> When operations are sent to site A, the gateway sender queues start to grow
> as expected and the heap memory consumed by the queues does not grow
> indefinitely given that there is overflow to disk when the limit is reached.
> But, if a server is restarted, the restarted server will show a much higher
> heap memory used than the memory used by this server before it was restarted
> or by the other servers.
> This can even provoke that the server cannot be restarted if the heap memory
> it requires is above the limit configured.
> According to the memory analyzer the entries taking up the memory are
> subclasses of ```VMThinDiskLRURegionEntryHeap```.
> The number of instances of this type are the same in the restarted server
> than in the not restarted servers but on the restarted server they take much
> more memory. The reason seems to be that the ```value``` member attribute of
> the instances, in the case of the restarted server contains
> ```VMCachedDeserializable``` objects while in the case of the not restarted
> server the attribute contains either ```null``` or
> ```GatewaySenderEventImpl``` objects that use much less memory than the
> ```VMCachedDeserializable``` ones.
> If redundancy is not configured for the region then the problem is not
> manifested, i.e. the heap memory used by the restarted server is similar to
> the one prior to the restart.
> If the node not restarted is restarted then the previously restarted node
> seems to release the extra memory (my guess is that it is processing the
> other process queue).
> Also, if traffic is sent again to the Geode cluster, then it seems eviction
> kicks in and after some short time, the memory of the restarted server goes
> down to the level it had before it had been restarted.
> As a summary, the problem seems to be that if a server does GII
> (getInitialImage) from another server, eviction does not occur for gateway
> sender queue entries.
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